How could the overuse of household disinfectants weaken the immune system? by killing white blood cells that inhabit the surface of the skin
by breaking down the physical barriers of the skin and mucous
by reducing exposure to pathogens and the creation of specific macrophages
by reducing exposure to pathogens and the creation of specific memory cells

The observations of hooke and van leeuwenhoek documenting the existence of microscopic cells formed the basis of what important theory? a. the cell theory stating that all living things are composed of cellsb. the theory of spontaneous generation, which held that life forms could arise spontaneouslyc. the theory of chemotherapy, or use of antimicrobials to destroy pathogenic organismsd. the germ theory of disease and causative agents

What is the next step in muscle contraction after the actin changes shape? (apex)

The nursing instructor has been observing nursing students initiate an iv infusion. which action(s), if made by the nursing student, indicates that further instruction is needed? (select all that apply.) the nursing student: